Pipe-coupling



iii-@Iran S'rafrns 'Peri-zur @einem4 PHILIP Il. FARREY, OF AMSTERDAM, NEW YORK.

PIPE-COUPLENG.l

sPneIrIeATIoN forming part of Letters ratent No. 546,314,1iated september 1v, 1895.

Application filed October 29, l94. Serial No. 527,184.' (No model.)

To @ZZ whom it may concern:

Be it known that I, PHILIP 1I. FARREY, a citizen of the United States, residing at Ainsterdam, county of Montgomery, and State of New York, have vinvented certain new and useful Improvements in Pipe-Couplings, of which the following is a specification.

The invention relates to such improvements; and it consists of the novel construc- `tion and combination of parts hereinafter taining-ringA is first slipped onto the end portion of each pipe A2 to a position a short distance from the extreme end of the pipe.-

The interior diameter of the ring is approximately the same as the exterior diameter of the inelosed pipe. The pipe, which is made of lead, is then expanded by a tool in the usual or any7 known manner, so as to form an offset on the pipe betweenits end and .the ring, as shown. The expanded ends of the pipes are then connected by a coupling-tube B, having its ends inserted. in the respective pipes, and the sleeveV B2, the ends of which respectively inclose the ends of the pipes, including the rings A thereon. At b the end of the lead pipe is odset abruptly, forming a prominent ange or shoulder against which the ringl bears. The sleeve is provided midway of its length with the inner annular ange B3, adapted to receive and t the coupling-tube. The 'sleeve has its ends screwthreaded interiorly,'as shown at B4, and is provided at the inner end ot' its threaded portions with a seat for the retaining-ring A. At B6 the seat is shown beveled, and a packing-rin g B7 is interposed between the ring and seat. To bind and lock the parts together I v -the ring is circular.

Y insert the locking-nuts C, exteriorly screwthreaded to fit the screw-threaded portions of the sleeve and previously slipped onto the ends of the respective pipes, in the ends of the sleeve, and by meansof the screw-th reads 'force the nuts into engagement with the retaining-rings A, thereby forcing the ends of the lead pipes into the sleeve and onto the coupling-tube and making a tight yjoint between the relatively movable parts.

The packing-ring B7 may be of any desired cross-sectional form. Good results are obtained when the normal cross-sectional form of The pressure upon such ring produces a Iiattened surface in engagement with the inclined seat en the sleev-e and also in engagement with the exteripr surface of the inclosed pipe, as shown in Fig. 1. The vlength of the pipe end from its retaining-ring is such that the pipe will not engage the inner middle flange of the sleeve.

.By unscrewing the locking-nuts I can easily uneouple the pipes to remove any obstruction therefrom and again couple them, as above describedv, I am thus able to cheaply produce a detachable coupling which can be easily and quickly operated without solder or hammered packing.

'The coupling-tube is tightly secured within the inner middle flange B3 in any known manner, as by shrinking the sleeve thereon or by driving the tube within the ange B3, in either case forming a permanent connection between the sleeve and tube.` As thus constructed, the tube is supported by the sleeve and cannot be misplaced in the operation of coupling the pipes together, whereby either pipe may be coupled or uncoupled independently of the other.

My improved coupling is especially adapted for use with lead pipe, which, being comparatively soft and tractable, is not adapted to be provided with a thread or flange to-oler sufficient resistance to the movement of a clamp or follower to forma tight joint; and the inner seats B5 and B6 on the couplingsleeve have in common the function of limiting or opposing the inward movement of the retaining-ring to form a tight joint between the ring and sleeve independently of the lead pipe.

By forming the coupling-tube of a separate ICO - coupling-sleeve.

piece and securing it within the couplingsleeve, as shown, I am able to utilize drawn tubing for the coupling-tube and secure with slight expense a durable and efficient construction.

In Fig. 2 I have shown a modified form of my invention, in which a packngring D is interposedbetween the retaining-ring A on the expanded end of pipe A2 and the locking nuts C, and a packing-ring D is inserted between theinner expanded end of the lead pipe and the middle innei` iiange B3 ofi the' At b the end of the coupling-tube is shown tapered and the enlargement of the end of the lead pipe is gradual.

What I claim as new, and desire to secure by'Lettei-s Patent, is-

l. In a detachable coupling, the combination with an end-expanded lead-pipe, and retaining ring on the pipe at the junction of the expanded and nnexpanded portions, of a coupling-sleeve having a Screw-threaded end inclosing the expanded end of the pipe, a

coupling-tube formed of a separate` piece se f cured to the coupling-sleeve and inserted in the expanded end of the pipe, and a screwthreaded locking-nut in cngagementxwith the screw-threaded end of the sleeve and engageable with the retaining ring on the pipe, and an inner seat on the sleeve for limiting the inward movement of the retaining ring, substantially as described.

2. In a detachable coupling, the combination with an end-expanded lead pipe, und retaining-ring on the pipe at the junction of the expanded and unexpanded portions, of a vcoupling-sleeve having a screw-threaded end inclosing the expanded end of the pipe, a

'coupling-tube secured to the coupling-sleeve and inserted in the expanded end of the pipe, an inner inclined packing-seat on the sleeve, a screw-threaded locking-nut in engagement with the screw-threaded end of the sleeveand engageable with the retaining ring, and a packing-ring interposed between the retaining ring and the inclined packing-scatin tho sleeve, substantiallynas described.

Intestimony whereof I have hereunto ect my hand this 12th day of October, 180i..

PHILIP II. FARREY.

Witnesses:

RICHARD PICK, ISAAC JACKSON. 

